package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.annotation.AutoFill;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

@Service
public class DishServiceImpl implements DishService {

    /**
     * 新增菜品
     * @param dishDTO
     */

    @Autowired
    public DishMapper dishMapper;
    @Autowired
    public DishFlavorMapper dishFlavorMapper;

    @Autowired
    public SetmealDishMapper setmealDishMapper;
    @Autowired
    public SetmealMapper setmealMapper;
    //事务在启动类会启用注解方式的事务管理
//    @EnableTransactionManagement //开启注解方式的事务管理
    @Transactional
    @Override
    public void saveWithFlavor(DishDTO dishDTO) {
        //先插入基本信息还没有插入口味
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        dishMapper.insert(dish);

        Long id = dish.getId();

        //插入口味表数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors !=null && flavors.size()>0){

            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(id);
            });
            //才可以插入数据
            dishFlavorMapper.insertBatch(flavors);

        }

    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 批量删除菜品
     * @param ids
     */
    public void deleteBatch(List<Long> ids) {
        //起售中的菜品不可删
        for (Long id : ids) {
            Dish dish = dishMapper.getByid(id);
            if(dish.getStatus() == StatusConstant.ENABLE) {
                //为1 不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //关联的套餐菜品不能删除
        List<Long> setmealIds = setmealDishMapper.getSetmealIdByDishIds(ids);
        if(setmealIds != null && setmealIds.size() > 0){
            //有菜品存在套餐里面不能被删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);


        }
        /**
         * 删除菜品数据
         */
        for (Long id : ids) {
            dishMapper.deleteByid(id);
            //删除口味表数据
            dishFlavorMapper.deleteByDishId(id);
        }



    }

    /**
     * 根据id 查询菜品
     * @param id
     * @return
     */
    public DishVO getByIdWithFlavor(Long id) {
        Dish dish = dishMapper.getByid(id);



        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    @Override
    public void update(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);
        Long id = dishDTO.getId();
        dishFlavorMapper.deleteByDishId(id);

        List<DishFlavor> flavors = dishDTO.getFlavors();

        if(flavors !=null && flavors.size()>0){

            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(id);
            });
            //才可以插入数据
            dishFlavorMapper.insertBatch(flavors);

        }

    }


    @Transactional
    public void startOrStop(Integer status, Long id) {


        if (status == StatusConstant.DISABLE) {
            // 如果是停售操作，还需要将包含当前菜品的套餐也停售
            List<Long> dishIds = new ArrayList<>();
            dishIds.add(id);
            // select setmeal_id from setmeal_dish where dish_id in (?,?,?)
            List<Long> setmealIds = setmealDishMapper.getSetmealIdByDishIds(dishIds);
            if (setmealIds != null && setmealIds.size() > 0) {
                for (Long setmealId : setmealIds) {
                    Setmeal setmeal = Setmeal.builder()
                            .id(setmealId)
                            .status(StatusConstant.DISABLE)
                            .build();
                    setmealMapper.update(setmeal);
                }
            }
        }Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
